Bionic Nuts are roller skate locknuts made of 3M glass filled Nylon. No
shrinkage during the molding process, super strong threads for long
lasting nuts. Most important feature and reason for making Bionic Nuts: there is a
flange built into the nut unlike standard steel lock nuts. This flange
protects against denting bearing shields during the removal or assembly
of your wheels. Nearly every 1/2" wrench is designed too deep for the
assembly and disassembly of quad wheels. The slightest angle or pressure
from the wrench jeopardizes the efficiency of your bearing and can
ultimately cause drag and fatigue.